Elevator safety device.



M. BARTOS.

ELEVATOR SAFETY DEVICE.

APPLICATION FILED MAR. 1. 1915.

1 9 l 5 1 85% Patented Aug. 31, 1915.

2 SHEETS-SHEET 1.

COLUMBlA PLANOGRAPH (30., WASHINGTON, n c.

M. BARTOS.

ELEVATOR SAFETY DEVICE.

APPLICATION FILED MAR. 1. 1915.

Patented Aug. 31, 1915.

2 SHEETSSHEET 2.

111mm, 1 a0 31mm Mwriaa L m N o T n m s A w a c m A n c o N A L n u c 'rarns UNTT PATENT @FFTQ.

ELEVATOR SAFETY DEVICE.

Specification of Letters Patent.

Patented Aug. 31, 1915.

Application filed March 1,1915. Serial No. 11,206.

To all whom it may concern Be it known that I, MICHAEL BAR'ros, a subject of the King of Hungary, residing at Rayland, in the county of Jefferson and State of Ohio, have invented certain new and useful Improvements in Elevator Safety Devices, of which the following is a specifi- 7 of the hoisting cable becoming broken and thus preventing the car from dropping to the bottom of the shaft and the liability of accidents to the contents thereof incident to such a fall.

A further object is to provide shiftable locking bolts upon both the top and the bottom of an elevator car such bolts being automatically shiftable to their locked positions in the event of an accidental breaking of the elevator cable.

It is also designed to provide a retracting means for locking bolts connected to the hoisting cable and released upon a breaking of the cable for the automatic projecting of the said bolts.

WVith these general objects in View and others that will appear as the nature of the invention is better understood, the same consists in the novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the appended claims.

In the drawings forming a part of this application and in which like designating characters refer to corresponding parts throughout the several views, Figure 1 1s a side elevation of a car partially broken guide beams of the elevator shaft. is a transverse horizontal sectlonal view away and shown in connection with the Fig. 2

, thereof taken upon a plane slightlyabove the car and the roof thereof shown in top planrand partially broken away. Fig. 3 is a view similar to Fig. 1, but showing lockj' ing elements as operatively positioned with the elevator cable broken. Fig. 4 1s a vertical sectional view through a plane of the locking bolts at one side of the car parts being broken away, and Fig. 5 is a perspective view of one of the locking bolts detached.

Referring more in detail to the drawings, the car 10 is illustrated as provided upon its opposite sides with spaced plates 11 for receiving the opposite vertically positioned guide rails 12 of the elevator shaft therebetween, it being noted that the inner opposite sides of the said guide rails are made in the form of toothed racks 13.

Transverse casings 14C and 15 respectively are provided upon the top and the bottom of the car having their open opposite ends communicating between the pairs of spaced guide plates 11 of the car. One of the locking bolts 16 of the form illustrated in Fig. 5

is slidably mounted within each end of the casings 141 and 15, the said bolts having enlarged toothed outer ends or feet 17 positioned adjacent the guide beam racks 13 and normally retained separate therefrom as illustrated in Fig. 1.

The casing 14L is provided with housings 18 upon the top thereof and through which housings, shafts 19 are rotatably journaled extending entirely across the car and having their opposite ends projecting outwardly of v the sides thereof.

. trally provided with a vertical perforation 23 through which a supporting bolt 24 is. slidably positioned and has a ring 25 at its upper free end to which the hoisting cable 26 of the elevator car is attached. The lower end of the bolt is connected to the inner ends of the levers 20 by means of links 27 the said links and levers forming toggle members when taken together. An expansion spring 28 encircles the bolt 24 and is positioned between the lower head 29 of the bolt and the yoke 22, and is held under compression as illustrated in Fig. 1 when the car is supported by the cable 26.

The casings 14 and 15 are provided with longitudinal slots 30 and 31 respectively through their opposite sides and have rods 32 and 33 positioned therethrough and also through the substantially central perfora tions 34 of the bolts which are within the said casings. Depending arms 35 are provided upon the shafts 19 adjacent their op-- posite ends which arms are provided with slots 36 having said rods 32 positioned therethrough. With this arrangement of elements, it will be seen that when the cable 26 is in normal position supporting the car, the levers 20 will be tilted upwardly as illustrated in Fig. 1, while the arms 35 will maintain the rods 32 inwardly and with the bolts 16 of the upper casing 14 retracted against the casing springs 37 which will be:

compressed and placed under tension there by. In the event that the cable 26 becomes broken, the spring 28 is released and acts to lower the links 27 and bring the arms 20 substantially horizontal as shown in Fig. 3

which results in turning the shafts 19 and their arms 35 to outwardly project the bolts; 16 as assisted by the said springs 37 and en-, gaging the feet 17 of the bolts with the teeth 13 of the racks.

A depending bracket 38 is arranged at each end of the car and has crossed operating levers 39 centrally pivoted thereto upon bolts 40 arranged at the lower ends of the said brackets. The upper ends of the levers 39 are provided with slots 41 slidably mounted over the rods 32, while similar lon- "gitudinal slots 42 at the lower ends of the said levers 39 have the rods 33 slidably positioned thcrethrough. By this arrangement of connecting levers, it will be seen that upon a movement of the upper bolt actu ating the rods 32, a corresponding simultaneous movement will be imparted to the lower bolt controlling rods 33, it being also noted that the lower bolts which are arm ranged within the casing 15 have projection springs 37' identical to the springs 37 which are provided in the upper casing 14. A device is thereby provided in which the accidental breaking of the elevator cable 26 results in the automatic projection of both the upper and the lower locking bolts and the toothed feet 17 thereof being engaged with the racks 1.3, the downward movement of the car will be immediately stopped and the car prevented from falling downwardly in the shaft. It will also be seen that upon repairing the cable 26, an upward pull upon the same will release the locking bolts so that the cable may again elevate and operate the car within the shaft. The controller box 43 is illustrated within the car 10 having an operating handle 44 operable in the usual manner which obviously needs no other description.

While the form of the invention herein shown and described is what is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor Y changes may be made without departing from the spirit and scope of the invention as claimed.

What I claim is prising in combination with the guide timbers of an elevator shaft and the car movable therebetween, separate casings transversely arranged upon the top and the bottom of the said car, slidable bolts arranged in the opposite ends of the said casings, projection springs arranged in said casings inwardly of the said bolts, operative connections at opposite sides of the car between the upper and lower sets of bolts, operating levers operatively connected withthe upper set of bolts, a vertical shiftable bolt, connecting links between the lower end of the said vertical bolt and the inner ends of the said levers, a hoisting cable secured to the upper end of the said vertical bolt, and an expansion spring operatively carried by the said last-named bolt.

. 2. A safety device comprising in combination with an elevator car having spaced pairs of guide plates at opposite sides thereof, tubular casings positioned transversely of the bottom and top of the car and openings between the said pairs of plates, locking hou sings and having their opposite ends pro ecting outwardly of the sides of the car, operating levers having their outer ends keyed to the said shafts within the said housings, a hoisting cable operatively attached to the inner ends of the said levers, automatic lowering means for the said levers, operative connections between the said shafts and upper bolts and simultaneous shifting connections between the said upper and lower bolts.

3. A safety device comprising in combination with an elevator car having spaced pairs of guide plates at opposite sides thereof, tubular casings positioned transversely of the bottom and top of the car and opening between the said pairs of plates, locking ioo bolts slidably arranged within said casings and having outwardly projecting enlarged toothed feet, inwardly positioned expansion springs engaging each of the said bolts and positioned within the said casings, housings arranged upon the upper one of the said casings, shafts journaled through the said housings and having their opposite ends projecting outwardly of the sides of the car, operating levers having their outer ends keyed to the said shafts within the said housings, a hoisting cable operatively attached to the inner ends of the said levers, automatlc lowering means for the said levers, the said upper and lower casings provided with longitudinal slots, rods slidably 1. A device of the class described, comarranged through the said slots and the adiao jacent bolts and having their opposite ends projecting outwardly of the said car, arms secured to the outer ends of the said shafts and provided with longitudinal slots through which the upper ends of the said rods extend, and connections between said upper and lower rods.

4. A safety device comprising in combination with an elevator car having spaced pairs of guide plates at opposite sides thereof, tubular casings positioned transversely of the bottom and top of the car and opening between the said pairs of plates, locking bolts slidably arranged within said casings and having outwardly projecting enlarged toothed feet, inwardly positioned expansion springs engaging each of the said bolts and positioned within the said casings, housings arranged upon the upper one of the said casings, shafts journaled through the said housings and having their opposite ends projecting outwardly of the sides of the car, operating levers having their outer ends keyed to the said shafts within the said housings, a hoisting cable operatively attached to the inner ends of the said levers, automatic lowering means for the said levers, the said upper and lower casings provided with longitudinal slots, rods slidably arranged through the said slots and the ad jacent bolts and having their opposite ends projecting outwardly of the said car, arms secured to the outer ends of the said shafts and provided with longitudinal slots through which the upper ones of the said rods extend, centrally positioned depending brackets at the opposite sides of the car, crossed operating levers arranged in pairs and centrally pivoted to the lower ends of the said brackets and having longitudinal slots arranged adjacent their opposite ends, and having said upper and lower rods slidable therethrough.

In testimony whereof I afiiX my signature in presence of two witnesses.

MICHAEL BARTOS.

Witnesses:

PAUL CHUNVRA, JOHN FARBARK.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

